Model 162B Section IV
Paragraphs 4-15 to 4-16
output. Conversely, when V302B is not conducting, biased, and channel A operates normally. Set to
its plate voltage is approximately +lo0 volts, which CHANNEL B, S301 applies negative bias to the grid
reverse-biases diode CR302 and channel B operates of V302B.
normally. The conducting or non-cor,ducting states
of V302 are controlled by Vertical Presentation 4-16. With S301 at CHOPPED, the multivibrator free
switch S301. runs at approximately 200 kc, alternately switching
each channel on and off. The waveform at each plate
4-15. With S301 at CHANNEL A, negative bias is of V302 is differentiated, and the positive spike
applied to the grid of V302A, diode CR301 is reverse is clipped. For V302A, the differentiation is by
-
1
a RI09 )R209
r
+V
+
R340 1 R34 I - - 0
-
(1
V302B
>KC318
-IOOV+ +I 0 0
'bN" BIAS
n n -
-
CR303 CR304
IA
c 0 I- - r, 41
1-1,o I 0
ID- L-Ill0
4GATE SIGNAL FROM SWEEP GENERATOR
Figure 4-5. Electronic Switch
01558-1 4- 3 |